Barn - wasp nests and cobwebs

[AWSubie]

Bifen is the best!!!

 

[YLee Kioti]

Once I had problems with spiders and carpenter bees all over the old 40x60 barn. I sprayed everything from shelving to walls and ceilings joists and basically anything made out of wood with Bifen IT. 2 oz per gallon of water in a tank sprayer. I can do the barn using about 25-30 gallons of water and bifen IT mixed.
I did it in the spring and fall for a couple years but now once in the spring.

Also recommend Bifin IT, good stuff.
Did learn that mud daubers eat black widows and brown recluse. So, now that we've moved into the house I give them free reign.
However, those stinking black widows have made their way towards our house. Once the house was dried in though I did seal the sole plate with caulking and sprayed the studs with Bifen IT up to three/four feet garage and all. Read it was good for five years. So that should help until the yards gets under control.

If you work in the barn a lot, I would be very generous with the Bifen and out to around 3 to 4 feet around the outer perimeter as well, and more frequently if it rains a lot.